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State Partl. Name

Level Legend: - - - - - - - - - Below Recommended Low Runnable - - - - - - - - High Runnable Above Recommended - - - - - - - - - Unknown Unknown
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River Name/Section Class Level running? Updated
Anacostia, Northwest Branch [MD] US Rte 29 to Riggs Road I-III(V+) 12 cfs
0 cfs/hr
L1-
Below Recom.
01h21m
Antietam Creek [MD] 1) Upper: Oak Ridge Dr. to Hwy.68 I-II 3.37 ft
-0.01 ft/hr
R3-
Runnable
01h51m
Antietam Creek [MD] 2) Hwy 68 to Hwy 34 I-II 3.37 ft
-0.01 ft/hr
R4-
Runnable
01h51m
Antietam Creek [MD] 3) Hwy.34 to Potomac River I-II 3.37 ft
-0.01 ft/hr
R4-
Runnable
01h51m
Bear Creek [MD] U.S. 219 to Youghiogheny River at Friendsville IV 92 cfs
0 cfs/hr
L2-
Below Recom.
01h36m
Beaver Creek [MD] Beaver Creek Park N Ride (I-70) to Alternate Rt. 40 I(II) 3.37 ft
-0.01 ft/hr
L8-
Below Recom.
01h51m
Bennett Creek [MD] MD Route 355 to Monocacy River I-II 75 cfs
0 cfs/hr
L9-
Below Recom.
01h21m
Big Elk Creek [MD] PA Route 341 to Elkton I-II 72 cfs
0 cfs/hr
L9-
Below Recom.
02h21m
Broad Creek [MD] MD Route 136 to MD Route 623 I-II 215 cfs
+ 7 cfs/hr
L5-
Below Recom.
01h51m
Cabin John Creek [MD] River Road to Potomac II-III 46 cfs
-1 cfs/hr
L7-
Below Recom.
01h51m
Casselman, N. Branch [MD] Dung Hill Road to Maryland Route 495 I-III+ 1.58 ft
-0.01 ft/hr
L5-
Below Recom.
01h36m
Casselman [MD] MD Route 495 to Salisbury, Pennsylvania I-II 131 cfs
-2 cfs/hr
R0-
Lower Runnable
01h36m
Catoctin Creek [MD] US 40 to Potomac River I-II 2.25 ft
0.00 ft/hr
R0-
Lower Runnable
01h21m
Conowingo Creek [MD] Oakwood to Susquehanna River IV-V 313 cfs
0 cfs/hr
L7-
Below Recom.
00h22m
Crabtree Creek [MD] Swanton, MD to Savage Reservoir III-IV+ 149 cfs
-15 cfs/hr
L4-
Below Recom.
01h51m
Deep Creek [MD] Dam to Youghiogheny River V n/a

Deer Creek [MD] 1. Bond Road to MD 23 I 2.77 ft
+0.02 ft/hr
L7-
Below Recom.
01h51m
Deer Creek [MD] 2. Harford Creamery Rd. to Eden Mill Park boat ramp I 2.77 ft
+0.02 ft/hr
R2-
Lower Runnable
01h51m
Deer Creek [MD] 3. Eden Mill Dam to Rocks State Park I-II(III) 2.77 ft
+0.02 ft/hr
R4-
Runnable
01h51m
Deer Creek [MD] 4. Rocks State Park to US 1, Benjamin Bridge Access I-II(III) 2.77 ft
+0.02 ft/hr
R3-
Runnable
01h51m
Deer Creek [MD] 5. US Rt 1, Benjamin Bridge Access to MD 136 I-II 2.77 ft
+0.02 ft/hr
R4-
Runnable
01h51m
Deer Creek [MD] 6. MD 136 to Susquehanna River I-II 2.77 ft
+0.02 ft/hr
R4-
Runnable
01h51m
Evitts Creek [MD] Lake Gordon Dam (PA) to Maryland Route 51(MD) I-III 4.30 ft
+0.05 ft/hr
L8-
Below Recom.
01h36m
Fifteen Mile Creek [MD] US Route 40 to Potomac River I-II(III) 1.50 ft
-0.01 ft/hr
L0-
Below Recom.
02h06m
Flintstone Creek [MD] Flintstone Creek Road to Town Creek I-III 491 cfs
+ 16 cfs/hr
L9-
Below Recom.
01h36m
Georges Creek [MD] Maryland Rte. 36 (Midland) to N. Branch Potomac River III-IV 4.42 ft
-0.01 ft/hr
L8-
Below Recom.
01h21m
Gunpowder Falls [MD] 1 - Graves Run Rd to Prettyboy Reservoir (Gunpowder Road) II+ 55 cfs
-9 cfs/hr
R0-
Lower Runnable
01h36m
Gunpowder Falls [MD] 2 - Prettyboy Dam to Falls Road I-III 182 cfs
+ 5 cfs/hr
R4-
Runnable
02h06m
Gunpowder Falls [MD] 3 - Falls Road to Big Falls Road I-II 182 cfs
+ 5 cfs/hr
R4-
Runnable
02h06m
Gunpowder Falls [MD] 4. Big Falls Road to Monkton Road I-II 426 cfs
-215 cfs/hr
R5-
Runnable
01h53m
Gunpowder Falls [MD] 5. Monkton Road to Phoenix I 669 cfs
-107 cfs/hr
R6-
Runnable
01h51m
Gunpowder Falls [MD] 6 - Lower Loch Raven Dam to Route 1 I-II ~ 1145 cfs
-13 cfs/hr
R5-
Runnable
01h19m
Gunpowder Falls [MD] 7 - Route 1 to U.S.40 III-IV ~ 1228 cfs
-13 cfs/hr
R6-
Runnable
01h19m
Gwynns Falls [MD] 1) Villa Nova to Woodlawn II 901 cfs
-95 cfs/hr
H6-
Above Recom.
01h36m
Gwynns Falls [MD] 2) Gwynn Oak Ave. to Wilkens Ave (US 1) II-III(IV) 901 cfs
-95 cfs/hr
H9-
Above Recom.
01h36m
Herring Run [MD] Echodale Ave to US 40 II-III 22 cfs
-13 cfs/hr
L9-
Below Recom.
01h17m
Hunting Creek [MD] Catoctin Hollow Road to Frank Bentz Lake III-IV+(V) 119 cfs
0 cfs/hr
L7-
Below Recom.
01h21m
Jennings Run [MD] Barrelville to Wills Creek III+ 584 cfs
-28 cfs/hr
L8-
Below Recom.
00h51m
Jones Falls [MD] Lake Roland to Round Falls I-III n/a

Laurel Run [MD] Laurel Run IV 3.93 ft
-0.02 ft/hr
L2-
Below Recom.
01h51m
Little Falls [MD] Parkton (Maryland Route 45) to Gunpowder Falls I-III 415 cfs
-107 cfs/hr
R0-
Lower Runnable
01h51m
Little Gunpowder Falls [MD] 1) Bottom Rd @ Laurel Brook to Jerusalem Mill (Jerusalem Rd.... I-II 108 cfs
+ 23 cfs/hr
L0-
Below Recom.
01h51m
Little Gunpowder Falls [MD] 2) Jerusalem Mill (Jerusalem Rd.) to U.S. Route 40 II-III 108 cfs
+ 23 cfs/hr
R0-
Lower Runnable
01h51m
Little Patuxent [MD] US Route 29 (Columbia) to US Route 1 I-IV 5970 cfs
+4158 cfs/hr
H9-
Above Recom.
01h51m
Little Seneca Creek [MD] Boyds to Darnestown II(III) 156 cfs
-5 cfs/hr
L8-
Below Recom.
01h17m
Long Green Creek [MD] Glen Arm Rd. to Gunpowder Falls IV 83 cfs
-10 cfs/hr
L9-
Below Recom.
01h51m
Middle Creek (Toms Creek trib.) [MD] T318 to Harney Road II+ 323 cfs
+ 143 cfs/hr
L9-
Below Recom.
01h36m
Middle Patuxent [MD] Carroll Mill Road to Savage Mill I-II(IV) 13.09 ft
+4.56 ft/hr
H9-
Above Recom.
01h51m
Middle creek [MD] Wolfsville to Myersville II-III(V) 2.25 ft
0.00 ft/hr
L7-
Below Recom.
01h21m
Mill Run [MD] Pigs Ear Road to Yough River Lake III-IV+ 32 cfs
-1 cfs/hr
L0-
Below Recom.
01h51m
Monocacy River [MD] 1. Creagerstown Park to Devilbiss Bridge Park I 4.42 ft
+0.43 ft/hr
R5-
Runnable
01h36m
Monocacy River [MD] 2. Devilbiss Bridge Park to Riverbend Park I 4.42 ft
+0.43 ft/hr
R5-
Runnable
01h36m
Monocacy River [MD] 3. Pinecliff Park to Buckeystown Park I(II) 4.42 ft
+0.43 ft/hr
R5-
Runnable
01h36m
Monocacy River [MD] 4. Buckeystown Park to Park Mills Road I(II) 4.42 ft
+0.43 ft/hr
R5-
Runnable
01h36m
Muddy Creek [MD] Cranesville Swamp Nature Preserve (Lake Ford Road) to Youghi... I-III(V) 32 cfs
-1 cfs/hr
L2-
Below Recom.
01h51m
Northeast Creek [MD] below covered bridge on Route 272 V 72 cfs
0 cfs/hr
L8-
Below Recom.
02h21m
Octoraro Creek [MD] New Bridge Road to Richardsmere II 313 cfs
0 cfs/hr
R0-
Lower Runnable
00h22m
Olmsted Island Creek [MD] Clara Barton Parkway to C&O Canal V n/a

Owens Creek [MD] 1) Lantz to Roddy Covered Bridge II-IV 119 cfs
0 cfs/hr
L7-
Below Recom.
01h21m
Owens Creek [MD] 2) Rocky Ridge Road (Hwy.77) to Monocacy River I-II 119 cfs
0 cfs/hr
L9-
Below Recom.
01h21m
Patapsco, S. Branch [MD] 1. Woodbine to Henryton Rd. II+(III) 329 cfs
0 cfs/hr
R3-
Runnable
02h08m
Patapsco, S. Branch [MD] 2. Marriottsville Rd to Woodstock I-III(IV) 5340 cfs
+1999 cfs/hr
H9-
Above Recom.
01h51m
Patapsco [MD] Woodstock to Elkridge none 5340 cfs
+1999 cfs/hr
H1-
Above Recom.
01h51m
Piney Run [MD] Arrington Road to Marriottsville I-III(IV) 41 cfs
+ 8 cfs/hr
L5-
Below Recom.
02h06m
Potomac, North Branch [MD] 1. Henry, WV to Gormania, WV I-III 3.93 ft
-0.02 ft/hr
L4-
Below Recom.
01h51m
Potomac, North Branch [MD] 2. Gormania, WV to Kitzmiller, MD III-IV 3.93 ft
-0.02 ft/hr
R2-
Lower Runnable
01h51m
Potomac, North Branch [MD] 3. Kitzmiller, MD to Jennings Randolph Lake II-III 3.93 ft
-0.02 ft/hr
R3-
Runnable
01h51m
Potomac, North Branch [MD] 4. Barnum, WV to Bloomington, MD II(III) 463 cfs
0 cfs/hr
R0-
Lower Runnable
01h51m
Potomac, North Branch [MD] 5. Bloomington, MD to Keyser, WV I-II 747 cfs
0 cfs/hr
R3-
Runnable
02h06m
Potomac, North Branch [MD] 6. Black Oak River Access Nr. McCoole, MD to Pinto, MD I 747 cfs
0 cfs/hr
R4-
Runnable
02h06m
Potomac, North Branch [MD] 7. Pinto, MD to Upper Potomac Industrial Park (upstream of C... I 747 cfs
0 cfs/hr
R4-
Runnable
02h06m
Potomac [MD] 0HF-1. Dargans Bend Boat Ramp to Sandy Hook/Potoma Wayside II 7.33 ft
-0.06 ft/hr
H5-
Above Recom.
01h51m
Potomac [MD] 0HF-2. Sandy Hook/Potoma Wayside to Point of Rocks I-II 7.33 ft
-0.06 ft/hr
R8-
Upper Runnable
01h51m
Potomac [MD] 1. Mouth of Monocacy to Riley's Lock Boat Ramp I 4.93 ft
0.00 ft/hr
R5-
Runnable
01h21m
Potomac [MD] 2. Violette's Lock/GW Canal Loop/Violette's to Pennyfield/Se... I-II 4.93 ft
0.00 ft/hr
R5-
Runnable
01h21m
Potomac [MD] 3. Great Falls (Center Lines) V+ 4.93 ft
0.00 ft/hr
H9-
Above Recom.
01h21m
Potomac [MD] 3. Great Falls (Fish Ladder) V+ 4.93 ft
0.00 ft/hr
H1-
Above Recom.
01h21m
Potomac [MD] 3. Great Falls (MD Lines) V+ 4.93 ft
0.00 ft/hr
H1-
Above Recom.
01h21m
Potomac [MD] 3. Great Falls (VA Lines) V 4.93 ft
0.00 ft/hr
H9-
Above Recom.
01h21m
Potomac [MD] 4. Sandy Beach/O-Deck to Anglers Inn III-IV 4.93 ft
0.00 ft/hr
R7-
Upper Runnable
01h21m
Potomac [MD] 5. Anglers Inn to Lock 10 II 4.93 ft
0.00 ft/hr
R7-
Upper Runnable
01h21m
Potomac [MD] 6. Lock 10 to Sycamore Island I 4.93 ft
0.00 ft/hr
R7-
Upper Runnable
01h21m
Potomac [MD] 7. Little Falls IV 4.93 ft
0.00 ft/hr
R8-
Upper Runnable
01h21m
Rock Creek [MD] 1. Rockville to Military Road I(II) 46 cfs
-1 cfs/hr
L8-
Below Recom.
01h51m
Rock Creek [MD] 2. Military Road to Potomac River in D.C. I-III 46 cfs
-1 cfs/hr
L7-
Below Recom.
01h51m
Savage [MD] Avilton Lonaconing Road to Head of Savage Reservoir II(IV) 149 cfs
-15 cfs/hr
L0-
Below Recom.
01h51m
Savage [MD] Dam to North Branch Potomac River III-IV 203 cfs
0 cfs/hr
L0-
Below Recom.
01h51m
Seneca Creek [MD] Black Rock Mill to Riley's Lock Boat Ramp I-II 156 cfs
-5 cfs/hr
R1-
Lower Runnable
01h17m
Sideling Hill Creek [MD] Purcell Penn.(sr 2011)to the Potomac river I-II 1.50 ft
-0.01 ft/hr
L0-
Below Recom.
02h06m
Town Creek [MD] I-68 to Potomac River I 491 cfs
+ 16 cfs/hr
R4-
Runnable
01h36m
Wills Creek [MD] Ellerslie to Eckhart Junction I-II 584 cfs
-28 cfs/hr
R4-
Runnable
00h51m
Winters Run [MD] Pleasantville Road to Maryland Route 7 I-II 156 cfs
-9 cfs/hr
L8-
Below Recom.
01h51m
Youghiogheny [MD] 0. US Route 50 to Millers Run I-II 32 cfs
-1 cfs/hr
L4-
Below Recom.
01h51m
Youghiogheny [MD] 1. Tippy-Top IV 420 cfs
-6 cfs/hr
R2-
Lower Runnable
01h51m
Youghiogheny [MD] 2. Top IV-V 420 cfs
-6 cfs/hr
R2-
Lower Runnable
01h51m
Youghiogheny [MD] 3. Upper IV-V 3.30 ft
-0.01 ft/hr
R3-
Runnable
01h21m
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